Shiva Ayyadurai Absolutely, Positively did not invent email
Shiva Ayyadurai lies. He did not invent email. Not even a little bit. MIT, who was funding his lab, dissociated itself from him completely after he made this claim, and dropped all funding for his lab; they did not want to be associated with such an obvious charlatan.
His tendency to sue people who point out this absolutely true, incontrovertible fact, just makes him a thin-skinned, censorious asshat. Ignore everything he says or writes, as it is likely to be more of the same bullshit.